Diacerein EP Impurity A

Chemical Name: Emodin ; 1,3,8-trihydroxy-6-methylanthracene-9,10-dione

Synonym: (6R,8R,9S,10R,13S,14S,17R)-17-acetyl-6-chloro-10,13-dimethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl acetate ; 6β-chloro-3,20-dioxopregn-4-en-17-yl acetate